Actually, DOS2 has 74k lines of dialogues with voice over and over 1m words. That's about Dragon Age Inquisition level of voice acting budget. BG2 had 57k lines of dialogues, but around 1 millions words.
DOS2 has far less text than PoE (BG/BG2/IWD etc). There are no walls of text anywhere, avarage paragraph length is about 2.5 sentences. Nothing wrong with that, but it's avery different writing style.
For comparison, POE1 had 25k line of dialogues with a bit over 6k of them voice acted. It was announced in the FIGstarter that Deafire would get x2 the voice acting budget of POE1, so their VO budget is for ~12k lines.
Bottom of the line, DOS2 voice acting budget was 12x larger than POE1's budget and 6x larger than POE2 VO budget.
An interesting comparison but I wouldnt use the word “budget” as we don’t know how much money is spent on what. We can’t possibly compare voice acting budgets between both games, as they are created on different continents.